iOS Swift Conversion (#2527)

Converts iOS implementation from Objective-c to Swift

# During the conversion process some updates to the code structure were also made
- Modularize codebase from single file to smaller focused files
- Untangled large nested IF statements
- Added more null checks, since Swift is more strict with null pointers
- Added property to allow for decoding of local video sources with self contained key for offline playback
- Updates example apps to test react-native 0.63.4 and uses auto native dependency imports for android and ios

examples/basic/android/app/src/main/java/com/videoplayer/MainActivity.java

@@ -4,12 +4,12 @@ import com.facebook.react.ReactActivity;
 
 public class MainActivity extends ReactActivity {
 
-    /**
-     * Returns the name of the main component registered from JavaScript.
-     * This is used to schedule rendering of the component.
-     */
-    @Override
-    protected String getMainComponentName() {
-        return "VideoPlayer";
-    }
+  /**
+   * Returns the name of the main component registered from JavaScript. This is used to schedule
+   * rendering of the component.
+   */
+  @Override
+  protected String getMainComponentName() {
+    return "VideoPlayer";
+  }
 }

examples/basic/android/app/src/main/java/com/videoplayer/MainApplication.java

@@ -1,21 +1,17 @@
 package com.videoplayer;
 
 import android.app.Application;
-
-import androidx.multidex.MultiDexApplication;
+import android.content.Context;
+import com.facebook.react.PackageList;
 import com.facebook.react.ReactApplication;
-import com.brentvatne.react.ReactVideoPackage;
+import com.facebook.react.ReactInstanceManager;
 import com.facebook.react.ReactNativeHost;
 import com.facebook.react.ReactPackage;
-import com.facebook.react.shell.MainReactPackage;
 import com.facebook.soloader.SoLoader;
-
-import com.reactnativecommunity.picker.RNCPickerPackage;
-
-import java.util.Arrays;
+import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 
-public class MainApplication extends MultiDexApplication implements ReactApplication {
+public class MainApplication extends Application implements ReactApplication {
 
   private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
     @Override
@@ -25,11 +21,12 @@ public class MainApplication extends MultiDexApplication implements ReactApplica
 
     @Override
     protected List<ReactPackage> getPackages() {
-      return Arrays.asList(
-        new MainReactPackage(),
-        new ReactVideoPackage(),
-        new RNCPickerPackage()
-      );
+      @SuppressWarnings("UnnecessaryLocalVariable")
+      List<ReactPackage> packages = new PackageList(this).getPackages();
+      // Packages that cannot be autolinked yet can be added manually here, for
+      // example:
+      // packages.add(new MyReactNativePackage());
+      return packages;
     }
 
     @Override